Comparative Analysis of Deterministic and Nondeterministic Decision Trees

This book compares four parameters of problems in arbitrary information systems: complexity of problem representation and complexity of deterministic, nondeterministic, and strongly nondeterministic decision trees for problem solving. Deterministic decision trees are widely used as classifiers, as a means of knowledge representation, and as algorithms. Nondeterministic (strongly nondeterministic) decision trees can be interpreted as systems of true decision rules that cover all objects (objects from one decision class).

This book develops tools for the study of decision trees, including bounds on complexity and algorithms for construction of decision trees for decision tables with many-valued decisions. It considers two approaches to the investigation of decision trees for problems in information systems: local, when decision trees can use only attributes from the problem representation; and global, when decision trees can use arbitrary attributes from the information system. For both approaches, it describes all possible types of relationships among the four parameters considered and discusses the algorithmic problems related to decision tree optimization. The results presented are useful for researchers who apply decision trees and rules to algorithm design and to data analysis, especially those working in rough set theory, test theory and logical analysis of data. This book can also be used as the basis for graduate courses.

Focuses on the comparative analysis of deterministic and nondeterministic decision trees for problems in information systems Compares the complexity of problem representation and minimum complexities of deterministic, nondeterministic, and strongly nondeterministic decision trees, solving the problem in the frameworks of both local and global approaches Intended for researchers who use decision trees and rules in the design and analysis of algorithms, and in data analysis, especially those working in rough set theory, test theory and logical analysis of data

Inhalt
Introduction.- Basic Denitions and Notation.- Lower Bounds on Complexity of Deterministic Decision Trees for Decision Tables.- Upper Bounds on Complexity and Algorithms for Construction of Deterministic Decision Trees for Decision Tables.- Bounds on Complexity and Algorithms for Construction of Nondeterministic and Strongly Nondeterministic Decision Trees for Decision Tables.- Closed Classes of Boolean Functions.- Algorithmic Problems.- Basic Denitions and Notation.- Main Reductions.- Functions on Main Diagonal and Below.- Local Upper Types of Restricted Sccf-Triples.- Bounds Inside Types.